Chemical degradation of polyurethanes: Degradation of flexible polyester polyurethane foam by phosphonic acid dialkyl esters

Troev K; Tsekova A; Tsevi R

Journal of Applied Polymer Science, Vol.78, No.14, 2565-2573, 2000

DOI10.1002/1097-4628(20001227)78:14<2565::AID-APP180>3.0.CO;2-H Export Citation

Chemical degradation of polyurethanes: Degradation of flexible polyester polyurethane foam by phosphonic acid dialkyl esters

Troev K, Tsekova A, Tsevi R

Flexible polyurethane foam based on toluene diisocyanate and polyester polyol has been liquefied by treatment with either dimethyl phosphonate (CH3O)(2)P(O)H or diethyl phosphonate (C2H5O)(2)P(O)H at 160 degreesC. The product degraded has been studies by H-1, C-13, and P-31 nuclear magnetic resonance (NMR) spectroscopy. The likely reaction mechanism is presented.

Keywords:chemical recycling;flexible polyester polyurethane foam;chemical degradation;dimethyl phosphonate;diethyl phosphonate

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